Transaction Isolation and Concurrency Control in Databases - PostgreSQL Case Study

Explore the intricacies of transaction isolation and concurrency control in databases through this informative conference talk from GeeCON Prague 2022. Delve into the mechanisms behind achieving transaction isolation and the trade-offs to consider. Examine the possibility of allowing clients to read data while simultaneous modifications occur. Learn about transaction isolation levels defined by prohibited phenomena, and understand how locking and versioning techniques are employed to isolate concurrent access to shared data by multiple clients. Discover the impact of these approaches on throughput and consistency. Gain practical insights through hands-on demonstrations with PostgreSQL, observing various phenomena across different transaction isolation levels. Peek under the hood of PostgreSQL's transaction isolation implementation, exploring row version checking and the implications of versioning. Address challenges associated with versioning, including the importance of VACUUM operations. Equip yourself with the knowledge to make informed decisions when scaling your database systems.